MC9S08JS8CWJ - 8-Bit 48MHz MCU, 8KB Flash | NXP
MPN: MC9S08JS8CWJ ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.6253 | $1.63 |
| 10 | $1.6253 | $16.25 |
| 100 | $1.6253 | $162.53 |
| 500 | $1.6253 | $812.65 |
| 1,000 | $1.6253 | $1,625.30 |
MC9S08JS8CWJ Overview
An HCS08 microcontroller is an embedded-control semiconductor that combines a CPU, program memory, data memory, peripherals, and I/O in one integrated device. The S08 family uses an 8-bit architecture intended for cost-sensitive embedded systems, where deterministic control, low component count, and simple firmware execution are more important than workstation-class processing performance.
Key verified features include an 8-bit HCS08 central processing unit, operation up to 48 MHz, an internal bus listed at 24 MHz, 8 KB Flash organized as 8K x 8, and 512 x 8 bits of RAM. The source data also identifies USB 2.0, LINbus, SCI, SPI, PWM, low-voltage detection, power-on reset, and 14 I/O capabilities, making the device suitable for connected peripheral control.
The MC9S08JS8CWJ is supplied in a 20-SOIC package. The verified datasheet listing describes the device as an 8-bit MCU with 8 KB Flash and USB 2.0, while distributor data identifies the same 20-SOIC package and 48 MHz speed. Because the supplied evidence does not provide a complete manufacturer pin table, individual pin names are not asserted here.
Typical uses include USB-connected control nodes, industrial interface modules, serial bridges, instrumentation peripherals, and compact consumer or embedded-control products. The 3.3 V and 5 V supply descriptions support both legacy 5 V and lower-voltage system designs, subject to the complete manufacturer electrical limits.
The principal design consideration is not to infer USB, timing, or peripheral compatibility from a similar S08JS part. Firmware, pin multiplexing, clock configuration, USB behavior, and reset requirements must be verified against the exact manufacturer documentation. This page combines verified source specifications, sourcing information, lifecycle context, and engineering-oriented selection guidance.
Drop-in alternatives for MC9S08JS8CWJ — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with MC9S08JS8CWJ (same form factor and footprint) — differing in Connectivity, Package, RAM, Supply Voltage.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC9S08SH8CWJR
✅ Drop-In📋 Reference alternative (not in catalog)
MC9S08JS16CWJ
✅ Drop-In✓ In Stock
$3.85 / Unit
View Datasheet →MC9S08JS8CWJ Maximum Ratings & Electrical Characteristics
| Product Type | 8-bit HCS08 microcontroller |
| CPU Core | HCS08 |
| Data Bus Width | 8 bit |
| Maximum Clock Frequency | 48 MHz |
| Internal Bus Frequency | 24 MHz |
| Program Memory | 8 KB Flash (8K x 8) |
| RAM | 512 x 8 bits |
| Supply Voltage | 3.3 V or 5 V |
| Package | 20-pin SOIC |
| I/O Pins | 14 |
| Connectivity | USB 2.0, LINbus, SCI, SPI |
| Peripheral Features | PWM, low-voltage detection, power-on reset |
| Mounting Type | Surface mount |
| EEPROM | Not specified in verified source data |
| Lifecycle Status | End of life |
MC9S08JS8CWJ 20-pin soic Pin Configuration Guide
Pin configuration for MC9S08JS8CWJ (20-pin soic package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for MC9S08JS8CWJ.
Refer to the datasheet for full pin configuration.
Typical Applications
MC9S08JS8CWJ is suitable for 6 applications: USB Peripheral Controller, Industrial Serial Interface Module, Low-Cost Embedded Control Node, USB-to-Serial Bridge, Instrumentation Data Front End, Battery-Powered Device.
USB Peripheral Controller
The MC9S08JS8CWJ is a reasonable candidate for USB-connected peripheral control because the verified data identifies USB 2.0 device-controller support in the S08JS family. Its 48 MHz HCS08 core can execute control logic while the 8 KB Flash stores device firmware and the 512 x 8-bit RAM supports working data. A practical design would place the MCU in a compact 20-SOIC circuit, route USB through the specified pins, and validate enumeration, suspend, resume, and power-budget behavior against the exact datasheet. The main trade-off is lifecycle status: NXP lists the part as end of life, so future sourcing should be secured before production release.
Recommended
Industrial Serial Interface Module
The MC9S08JS8CWJ fits a compact industrial interface module when the system needs USB 2.0 alongside SCI, SPI, or LINbus connectivity. The 8-bit HCS08 processor operates up to 48 MHz, while 8 KB of Flash provides a defined but limited firmware budget and 512 x 8 bits of RAM handles protocol state and buffering. In a typical design, the device translates between a host interface and a local sensor or actuator, with reset and low-voltage detection supporting controlled startup. Industrial temperature, EMC, and endurance requirements are not provided in the verified data and must be checked before deployment.
Recommended
Low-Cost Embedded Control Node
The MC9S08JS8CWJ is suited to a low-cost embedded-control node when the application needs deterministic 8-bit processing, moderate flash capacity, and multiple serial interfaces rather than high-end computation. The verified 48 MHz HCS08 CPU and 24 MHz internal bus provide timing headroom for simple state machines, actuator sequencing, and sensor polling. Its 20-SOIC package makes it practical for conventional PCB assembly, while PWM can support motor, lighting, or signal-shaping functions. Designers must budget the limited 8 KB Flash and 512 x 8-bit RAM carefully, and they must account for the end-of-life sourcing status.
Recommended
USB-to-Serial Bridge
The MC9S08JS8CWJ can serve as the basis for a USB-to-serial bridge because USB 2.0, SCI, SPI, and LINbus are all identified in the verified feature summary. A bridge design can use the HCS08 CPU for protocol translation, buffering, and device control, with the 8-bit architecture keeping the firmware and hardware requirements manageable. The 20-SOIC package supports a compact implementation, but the designer must verify exact multiplexed pins, USB electrical requirements, baud-rate behavior, and bus timing. Because the part is end of life, the bridge should include an approved sourcing plan rather than depend on open market availability.
Recommended
Instrumentation Data Front End
The MC9S08JS8CWJ can be used in a compact instrumentation front end when the system needs to collect or condition data through SCI, SPI, or LINbus and expose the result through USB 2.0. The 48 MHz CPU provides timing for sampling, filtering, and status handling, while PWM and low-voltage detection support auxiliary monitoring functions. A practical implementation would allocate the limited RAM to a bounded acquisition buffer and use Flash for fixed control firmware rather than large data storage. The supplied sources do not provide analog specifications, ADC resources, temperature limits, or calibration details, so those requirements need separate verification.
Recommended
Battery-Powered Device
The MC9S08JS8CWJ may fit battery-powered embedded products when the application requires USB connectivity and low-cost control, but the available evidence does not include sleep-current or active-power measurements. The 3.3 V or 5 V supply description provides a starting point for rail selection, while low-voltage detection can help the firmware monitor battery condition. Designers should compare the MCU's verified operating-mode current against the available datasheet, power USB only when needed, and ensure that regulator dropout and peak peripheral current fit the battery budget. Lifecycle risk is significant because the NXP page identifies the device as end of life.
Recommended
Recommended Products Summary
Engineering reference data for MC9S08JS8CWJ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC9S08SH8CWJR | MC9S08JS16CWJ |
|---|---|---|---|
| Package | 20-pin SOIC | 20-pin SOIC | 20-pin SOIC |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| CPU Core | HCS08 | S08-family MCU; detailed core data not verified | S08JS-family MCU; detailed core data not verified |
Key Differentiators
- Verified USB 2.0 connectivity in an S08 control MCU (vs MC9S08SH8CWJR)
- Defined 8 KB Flash and 512 x 8-bit RAM configuration (vs MC9S08JS16CWJ)
- Verified 48 MHz maximum CPU frequency (vs MC9S08SH8CWJR)
- Broad verified peripheral set (vs MC9S08JS16CWJ)
Design Notes
The verified sources identify a 3.3 V or 5 V supply description, but do not provide complete operating-mode current, regulator dropout, or USB current limits. Before schematic release, check the exact MC9S08JS8CWJ electrical table and size the supply for startup, USB attachment, and maximum peripheral activity. If a downstream board uses 5 V, confirm that every connected I/O and USB path remains within the exact device limits rather than relying on the distributor summary.
Use the package-specific 20-SOIC pinout and land pattern from the manufacturer documentation, because the supplied source snippets do not provide a complete numbered pin table. Preserve the required decoupling arrangement near the power pins, route USB and serial signals with short return paths, and keep high-current or switching nodes away from sensitive communication traces. Validate the PCB against the exact package drawing rather than a generic SOIC footprint.
Do not treat the MC9S08SH8CWJR or MC9S08JS16CWJ as automatic replacements merely because both are related S08 devices and use a 20-SOIC package. Confirm pin names, alternate functions, memory size, USB behavior, clock configuration, supply limits, reset logic, and firmware linker assumptions first. The supplied cross-reference results do not quantify enough detail to prove pin-to-pin drop-in compatibility, so any migration should begin with hardware review and firmware regression testing.
The supplied data does not include the operating-temperature range, package thermal resistance, or power dissipation under the 48 MHz operating condition. For an end-of-life part, record the exact lot and source, and avoid extending temperature performance beyond the manufacturer limits. Estimated thermal calculations are not provided because the required verified input values are missing; obtain those values before deciding whether the 20-SOIC package needs additional copper or airflow.
Compliance Information
The supplied verified data does not provide reliable RoHS, REACH, lead-free, halogen-free, or conflict-minerals declarations. The part is an industrial/commercial microcontroller category entry; AEC-Q100 is not indicated and is marked not_applicable. NXP lists the part as end of life.